Method for controlling driving flow of wheel excavator

A method for controlling a driving flow of a wheel excavator receiving pressure oil discharged from a first hydraulic oil pump and a second hydraulic oil pump the method comprising:

• checking whether pump joint control as between the first hydraulic pump and the second hydraulic oil pump is normal;
• controlling a proportional control valve to control a maximum flow of a flow pump controlling a maximum flow of the first hydraulic oil pump and the second hydraulic oil pump;
• receiving a flow value of the flow pump controlled by the proportional control valve;
• checking an error when the flow value received during a control of the maximum flow has an error, and
• assigning a weight value to the checked error to compensate for the flow value,
• wherein checking the error includes calculating a difference between the received flow value and a current flow value, and
• wherein the current flow value is calculated by a proportion operation used for multiplying an error value of the proportional control valve, an integration operation used for multiplying the error value into an addition of the error value and a previous flow value, and a differentiation operation used for multiplying the error value into a difference of the error value and the previous flow value.